HP OpenView Storage Mirroring High Availability for Exchange Server 2000/2003 Application Notes (May 2005, T2558-88020)

Storage Mirroring High availability for Exchange Server 2000/2003 application notes 13
Applying an Exchange service pack or upgrade
1. Stop the Storage Mirroring service on the source. Any data that was already transmitted from the
source but is still in queue on the target will continue to process.
2. Apply the Exchange service pack or upgrade.
3. Verify that all of the data in queue on the target has been applied to the target before continuing. You
can verify that the target queue is empty by checking the Bytes in Target Disk Queue statistic in the
Target section of DTStat or the Bytes in Queue statistic in the Storage Mirroring Target section of
Performance Monitor. If these statistics are zero (0), the queue is empty and you can continue. If these
statistic are not zero, there is still data in queue on the target and you must wait before continuing. (For
information on DTStat and Performance Monitor statistics, see the HP OpenView Storage Mirroring
user’s guide.)
4. Start the Exchange services relevant to your environment on the target.
5. Apply the same Exchange service pack or upgrade, making sure that any settings applied are
identical to the source.
6. Stop all of the Exchange services on the target that you started.
7. Restart the Storage Mirroring service on the source. Storage Mirroring will automatically start a
difference mirror to bring the data on the target up-to-date with data that may have changed on the
source while you were going through this process.
When the difference mirror is complete, the target will be ready to stand in for the source with the updated
components.
Dealing with a failure
If a failure occurs and the Failover Control Center Time to Fail counter reaches zero (0), a dialog box will
appear in the Failover Control Center requiring user intervention to initiate failover. (If the Failover Control
Center is not open when the failure occurs, the dialog box will appear the next time the Failover Control
Center is opened and you are logged on to the target. See the HP OpenView Storage Mirroring user’s
guide for information on monitoring a failure.) Acknowledge the manual intervention prompt to start
failover.
The failover script created earlier will automatically run. During failover, Windows Event Viewer, Storage
Mirroring log, and Exchange Failover utility logs (located in the same directory as the Exchange Failover
utility) record the failover events. When failover is complete, the target will have the Exchange services
started, the databases mounted, and the users pointed to the target. At this time, clients can connect
through Outlook or Outlook Web Access to receive their e-mail. Users that had Outlook open during the
failure will need to restart the Outlook client (excluding Outlook Web Access clients on a LAN).
During a failover, you cannot create a new global address list because the forest-level Recipient Update
Service is still pointing to the source server. Use the instructions below if you need to create a new global
address list. If you do not need to create a new global address list while the target is standing in, you can
disregard these instructions.
1. Using System Manager on the target, expand the Organization object, then expand the Recipients
container.
2. Click Recipient Update Service.
3. In the left pane, right-click Recipient Update Service (Enterprise Configuration) and select Properties.
4. Next to the Exchange Server field, select Browse.
5. Locate the target server and click OK.
6. To manually initiate an update of the recipients in that domain, right-click the Recipient Update Service
and click Update Now or Rebuild to force an update.